Burglar-alarm



(No ModeL) 2 Sheets-Sheet 1.. T. J. GORDON. BURGLAR ALARM.

Patented July 30, 1889.

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' T. J. GORDON.

BURGLAR ALARM. No. 408,010. Patented July 30,1889.

UNITED STATES PATENT OFF CE.

THOMAS J. GORDON, OF OLATHE, KANSAS.

BU RG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 408,010, dated July 30,1889.

Application filed April 13, 1889. Serial No. 307,100, (No model.)

To all whom, it may concern:

Be it known that I, THOMAS J. GORDON, a citizen of the United States,and a resident of Olathe, in the county of Johnson and State of Kansas,have invented certain new and useful Improvements in Burglar-Alarms; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

Figure 1 of the drawings is a representation of this invention, and is aplan view of the alarm mechanism. Fig. 2 is a section taken where thebroken line :1; w is marked on Fig. 1. Fig. 3 is a section taken wherethe broken line y y is marked on Fig.1. Fig. 4 is a section taken wherethe broken line .2 z is marked on Fig. 1. Figs. 5 and 6 show the mannerof arranging the wires connected with the alarm for windows and doors.

This invention relates to certain improvements in burglar-alarms fordwellings and stores; and it consists of the novel combination and theirconstruction of parts, as will more fully appear from the followingdescription.

In carrying out my invention I employ an alarm mechanism, which I willdescribe as follows: Within an inclosing-case A, secured to a suitablebase a for putting it in posit-ion, is arranged a clock mechanism,including an escapement b and a hammer b, which is arranged to strike agong bisuitably disposed upon the base or bracket a.

O is a transversely or horizontally arranged spring-pressed plate likebar adapted to have a sliding movement and to project through the sideof the case A, its actuating end being provided with a knob c. This baror plate 0 has near one end a shoulder c, which is adapted to restagainst the hammer-rod and lock the striker or hammer in position, orhold it away from the gong when desired. This bar or plate has also aslot or aperture 0 therein near its other end, the purpose ofwhich willpresently appear.

D is a spring-pressed locking-bar arranged at right angles to the bar orplate 0, and having in its outer projecting or upper end an aperture (Zfor the convenient connection therewith of the wire 6, through whichconnection, as presently explained, is effected with the windows andstreet or outside doors. The inner or opposite end of the locking bar orrod D is adapted to engage or enter the aperture or slot 0 of the bar orplate 0 when it is desired to lock the said plate or bar O in position,the latter being pressed inward until its aperture or slot coincideswith the inner end of the bar or rod D, permitting the springingthereinto of the rod or bar D.

Simultaneously with the inward movement of the bar or plate 0 it will beseen that by the contact of its shoulder 0 with the hammer-rod thehammer b will be moved away from the gong b and will be locked in thatposition, preventing the ringing or sounding of thelatter. Arrangedcrosswise of the looking rod or bar D, and having one end extendingbeyond the left-hand side of the inclosingcase A, is a rotary rod E,which has a knob upon its projecting end for convenient manipulation,and a transverse pin 6' through it, adapted to engage a projection orstop 6 upon the inside of the case A, to limit its rotation when turn edby the hand applied to its knob. The rotary rod E has opposite the baror rod D a notch or recess 6 and the rod or bar D has a notch or recess9 coincident with the rod E.

It will be noticed that with the notch or recess e of rod E facing therod D the latter is capable of movement, and when the rod E is rotatedor turned, so as to cause the said notch or recess to face upward,bringing the convexity of the rod E into the notch or recess 6 of thebar or rod D, the latter is incapable of movement, therefore preventingany possibility of the accidental disconnection of the locking bar orrod D from the plate or bar 0 when holding the gong or bell hammer outof action or in its locked posit-ion.

The spring of the clock mechanism is wound by the application of the keyto the shaft f, as will be readily understood, turning the key, ofcourse, to the left. The wire 6 is passed along near the ceiling of theroom overpulleys g, suitably disposed, and at points over the windowsand outer doors it is severed and connected to rings g. From the rings gextend downward over other pulleys h suitably-disposed branch wiresi,which are carried under the lower pulleys h and upward next to thewindows and connected in any suitable way to the tops of the lowersashes. The attempted raising or movement of the sashes, it will thus beseen, would set off the alarm and give the required warning or notice.

In the application of the wires to the doors the connection is somewhatdiiferent, the branch wires 01 being through an eye or pulley Q1 andhaving, attached to its end a drop-hook '5 which is adapted toengagevwith a fixed projection or catch 1' upon the'inside of the doorat its extreme upper left-hand corner or at the opening side. From thisit is obvious that the attempted opening of the door would send in analarm. In order, however, to permit the occupant of the house to openthe door without disturbing the alarm, I connect with the drop-hook iacord j, which is passed over apulleyj, slightly elevated with relationto the top edge of the door, and so arranged as to permit the cord j toextend down closely to the joint, whereby it maybe easily reached andmanipulated with the door slightly opened by the hand placed through theopen ing thus furnished. A ring 9' is applied to the lower end of saidcord j, which is slipped upon a catch or hook 7c, projecting from thedoor-casing.

It will be observed that the relation of the hook i with the catch i issuch that a limited amount of movement is permissible between the sameprevious to engagement, in order to allow of the slight opening of thedoor, for the purpose presently disclosed.

It will be seen that while any one ignorant of the presence of thedetaching drop-hook contrivan ce just described attempting an entrancewould cause the alarm to be sounded, yet by the inmate or occupant ofthe dwelling or house reaching through the small opening furnished byslightly opening the door, as above stated, andpulling upon the cord j,the drop-hook will be removed sidewise or laterally from the catch orprojection 01 upon the door, and catching or slipping the ring 7' uponthe catch or proj ection it the door. can be opened in the usual mannerand admission obtained without interference with thealarm mechanism.

It willbe understood that my invention is equally applicable to barns,stables, or other out-houses.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s

1. The burglar-alarm having the clock mechanism, the hell or gong hammerand gong or bell, in combination with the plate or bar having a shoulderacting upon the hammer, and a slot or aperture, the springpressedlocking bar or rod engaging with the said slot or aperture and havingconnection with the windows and doors of a dwelling, &c., substantiallyas specified.

2. The combination, with the spring-pressed locking-rod engaging a slotor aperture in the spring-pressed plate or bar engaging with the bell orgong hammer rod, of the rotary rod or bar having a notch or recessfacing the aforesaid locking-rod, substantially as specified.

3. The combination, with the spring-pressed locking-rod engaging a slotor aperture in the spring-pressed hammer-locking bar or plate, of therotary rod having a notch or recess facing the aforesaid locking-rod,said latter-referred-to rod also having a notch or recess receiving theconvex or rounded portion of the rotary rod, substantially as set forth.Y

4. In a burglaralarm, the combination, with the alarm mechanism,comprising the spring-pressed locking-rod, the spring-pressed slottedplate or bar engaged by said rod, the bell or hammer rod engaged by saidplate, and the rotary rod or bar having a notch or recess facing saidlocking-rod, and the alarmtransmitting wire or medium, of the branchwire or its equivalent having a drop-hook engaging a catch or projectionon the door and having connected to it a manipulatingcord, or itsequivalent, passing over a suitably-disposed pulley, and means forholding the drop-hook away from the door, substantially as shown anddescribed.

In testimony whereof I attixmy signature in presence of two witnesses.

THOMAS J. GORDON.

\Vitn esses: I

BENJ. AMos, D. F. MCKAIG.

